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This image captured by the Mars Exploration Rover Opportunity's rear hazard-identification camera shows the now-empty lander that carried the rover 283 million miles to Meridiani Planum, Mars. (NASA)

This image shows the Mars Exploration Rover Opportunity's view of the martian horizon from its new position on the surface of Mars. Engineers received confirmation that Opportunity's six wheels rolled off the lander and onto martian soil at 3:01 a.m. PST, January 31, 2004, on the seventh martian day, or sol, of the mission.(NASA)

This 3-D image captured by the Mars Exploration Rover Opportunity's rear hazard-identification camera shows the now-empty lander that carried the rover 283 million miles to Meridiani Planum, Mars.(NASA)